CHEMICAL REACTION ENGINEERING QUIZ

The dispersion number of perfect mixed flow is

∞

> 150

< 2100

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The rate of a gas phase reaction is given by K . CA . CB. If the volume of the reaction vessel is reduced to l/4th of its initial volume, then the reaction rate compared to the original rate will be __________ times.

2

8

16

4

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In which of the following reactions, thee-quilibrium will shift to the right, if the total pressure is increased?

H₂ + Cl₂ ⇋ 2HCl

H₂ + I₂ ⇋ 2HI

N₂O₄ ⇋ 2 NO₂

N₂ + O₂ ⇋ 2NO

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The sequence in which three CSTR's of volumes 5, 10 and 15 m³ will be connected in series to obtain the maximum production in a second order irreversible reaction is

10, 15, 5

15, 10, 5

10, 5, 15

5, 10, 15

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A catalyst inhibitor

Lessens its selectivity

Is added in small quantity during the catalyst manufacture itself

All of these

May be useful for suppressing undesirable side reactions

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The role of a catalyst in a chemical reaction is to change the

Equilibrium constant

Activation energy

Final products

Heat of reaction

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Which of the following factors control the design of a fluid-solid reactor?

Size distribution of solids beingtreated

Reaction kinetics for single particle,

All of these

Flow patterns of solids and fluid in the reactor

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As the chemical reaction proceeds, the rate of reaction

Increases

May increase or decrease depending on the type of reaction

Remains same

Decreases

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A batch reactor is suitable for

Obtaining uniform polymerisation products in highly exothermic reactions

Liquid phase reactions

Achieving cent percent conversion of reactants into products

Large scale gaseous phase reactions

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Catalyst is a substance, which __________ chemical reaction.

Alters the value of equilibrium constant in a reversible

Decreases the speed of a

Can either increase or decrease the speed of a

Increases the speed of a

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